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using System;
using XenAPI;
using XenAdmin.Actions.VMActions;


namespace XenAdmin.Actions
{
    public class ChangeControlDomainMemoryAction : AsyncAction
    {
        long memory;

        public ChangeControlDomainMemoryAction(Host host, long memory, bool suppressHistory)
            : base(host.Connection, string.Format(Messages.ACTION_CHANGE_CONTROL_DOMAIN_MEMORY, host.Name()), suppressHistory)
        {
            Host = host;
            this.memory = memory;

            #region RBAC Dependencies
 
            ApiMethodsToRoleCheck.Add("vm.set_memory");

            #endregion
        }

        protected override void Run()
        {
            VM vm = Host.ControlDomainZero();

            try
            {
                XenAPI.VM.set_memory(Session, vm.opaque_ref, memory);
            }
            catch (Failure f)
            {
                if (f.ErrorDescription[0] == Failure.MEMORY_CONSTRAINT_VIOLATION
                    && memory < vm.memory_static_min)
                {
                    throw new Failure(string.Format(Messages.ACTION_CHANGE_CONTROL_DOMAIN_MEMORY_VALUE_TOO_LOW,
                        Util.MemorySizeStringSuitableUnits(memory, true),
                        Util.MemorySizeStringSuitableUnits(vm.memory_static_min, true)));
                }

                throw;
            }

            Description = Messages.COMPLETED;
        }
    }
}
